How do you make a loud sound on a flute?

You take your four fingers in one hand and slap them in your palm in the other hand. You can also slam both palms together, which creates a deeper sounding clap.

There's also a way to clap louder than everyone else. You can do this by slapping your palms together when they are directly parallel from each other, so that all the air and sound escapes from the area that your hands have clapped.